[CASSANDRA-12668] Memtable Contention in 2.1

• Type: Bug
• Status: Open
• Priority: Normal
• Resolution: Unresolved
• Component/s: Legacy/Core
• Severity: Normal
• Assignee: Unassigned
• Reporter: Sankalp Kohli
• Created: 19/Sep/16 19:31
• Updated: 16/Apr/19 09:30

Description

We added a new Btree implementation in 2.1 which causes write performance to go down in Cassandra if there is lot of contention in the memtable for a CQL partition. Upgrading a cluster from 2.0 to 2.1 with contention causes the cluster to fall apart due to GC. We tried making the defaults added in CASSANDRA-7546 configurable but that did not help. Is there anyway to fix this issue?